Home / 19,659.87-27,139.80-12,590.33

Finding the Fourth Proportional to 19,659.87, 27,139.80 and 12,590.33

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Solution

The fourth proportional to 19,659.87, 27,139.80 and 12,590.33 is: 17,380.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659.87 : 27,139.80 = 12,590.33 : x
  2. Step 2: Convert to fraction form
    19,659.87/27,139.80 = 12,590.33/x
  3. Step 3: Cross multiply
    19,659.87x = 27,139.80 × 12,590.33
  4. Step 4: Simplify right side
    19,659.87x = 341,698,902.44
  5. Step 5: Solve for x
    x = 341,698,902.44/19,659.87
  6. Step 6: Final answer
    x = 17,380.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.